Wang Xuezhi's words made Song Zhewu stunned, he couldn't remember when he saw this young man. Song Zhewu quickly thought about his impression of this young man in his mind, and said in his heart: "No! Such a talent, passing in front of his eyes, where will he be let go? Didn't you hit the muzzle of the gun. ”

Since Wang Xuezhi and Li Minghua, including the brothers Sun Sihua and Sun Sirong, both returned from overseas and were accustomed to the relatively relaxed political atmosphere in Europe, they did not feel any nervousness about sitting with Song Zhewu, the commander-in-chief of the lieutenant general.

Seeing that Song Zhewu was puzzled, Wang Xuezhi said: "I am now working in the Hankou Iron Works, and I have seen you in Hankou." Besides, the female reporter of the "Declaration" outside the station is still my cousin."

"Oh! Are you at the Hankow Iron Works? Then we can say that we are old acquaintances. I didn't expect Mr. Wang to welcome me, but I have to apologize to Mr. Wang. That cousin of yours is worthy of being a reporter, and she has such a powerful mouth! At that time, I was in a cold sweat! Song Zhewu joked with Wang Xuezhi that he wanted to try to create a relaxed atmosphere, so as to increase the sense of closeness and make preliminary preparations for the completion of his plan to attract people.

Song Zhewu's kind and relaxed words not only made the grandson of a high-ranking official like Song Zhewu who saw him at such a close distance for the first time, and his somewhat apprehensive mood relaxed, but Li Minghua and Wang Xuezhi, including the Sun brothers, were also completely relieved.

Father Sun hurriedly took advantage of this harmonious atmosphere, picked up his wine glass and said: "Today, Commander-in-Chief Song can enjoy the visit to the Humble House, our family is very honored, the conditions are simple, the wine is thin, and I hope that Commander-in-Chief Song will accept it with a smile." ”

Song Zhewu hurriedly stood up and said respectfully: "Uncle is polite, it should be an honor for Zhewu to come to the old man's house today, the two brothers Sihua and Sirong are all coming to my Fourth Route Army together, I really should have a banquet for the old man's family." I will borrow flowers to offer Buddha this cup of wine, and pay tribute to the old man. ”

Song Zhewu respected him so respectfully, which moved his grandfather very much, and happily toasted with Song Zhewu, and then persuaded him to drink and eat food again and again.

The wine has passed three rounds, and the dishes have passed five flavors. Seeing that Song Zhewu did not have the majesty of the superiors, Li Minghua also had a lot of good feelings towards Song Zhewu, picked up the cup, and said in an accent with an obvious Shaanxi accent: "Commander-in-Chief Song vigorously helped the victims in Hankou and saved many fleeing people in Shaanxi. ”

Song Zhewu hurriedly waved his hand and said, "Mr. Li, the duty of a soldier is to protect the family and the country, appease the place, and appease the people. Zhewu can't watch the people suffer and have no food and clothing, just do some duty, and he deserves Mr. Li's gratitude! With this glass of wine, we have ended the civil war for the country as soon as possible, and the people are living and working in peace and contentment. ”

Putting down the wine glass, Song Zhewu asked Li Minghua and Wang Xuezhi: "Both of them are great talents, I don't know where they graduated?" Where is it now? ”

Sun Sihua hurriedly stood up and introduced: "Commander-in-chief, let me introduce to you, both of them are high-level talents from the University of Lyon, France, and Brother Xuezhi is studying the smelting department and is now working at the Hanyang Iron Works; Brother Minghua studied electromagnetism, is a doctor, and is now an inspector in the Ministry of Education. ”

Then he said regretfully: "A few of us are Minghua's talents, but when he returns to China, there is no place for him to do anything." It's better that we can all find the right job, his electromagnetism now has no such research institute in China, and even various universities do not offer this course, now although he is working in the Ministry of Education, but it is only the surface scenery, every day just sit on the cold bench, today he has nothing to do, ran to Hankou to relax, just I sent a telegram to Xuezhi to say safety, and the two of them came to me again. ”

Li Minghua smiled bitterly and said: "Sihua is right, the inspector I am now in the Ministry of Education is just an idle position, and there is nothing to do at all, just to receive eighty oceans on time every month, I am sorry for this money." ”

"Since there are no conditions at home, why don't you stay abroad and do research?" Song Zhewu looked at Li Minghua and asked.

Li Minghua said with a heavy face: "If you stay abroad, you can continue to do research, but there is always a feeling in your heart that you are doing things for foreigners after all." When I went abroad to study, I had the idea of saving the country through science. Now I have returned to China after completing my studies, but I have no ambition to serve the country, but there is no way to serve the country, looking at the rapid development of foreign technology, but there are still wars and chaos in China, and no one cares about scientific research. After speaking, he couldn't help but sigh.

Song Zhewu thought to himself, he is another hot-blooded young man, the young people of this era are much stronger than the elites in later generations who cut their heads and go abroad and do not come back, such talents, he must not let go.

Song Zhewu also sighed and said: "Minghua is right, the development of foreign science and technology is changing with each passing day, take Minghua's study of electromagnetism as an example, although it is still limited to telegraph, telephone and other communication technologies, but electromagnetism is not only these applications, its use is very extensive, with the development of technology, electromagnetism will be gradually applied to national defense, industrial production and all aspects of our daily life, it is the most promising and important field of scientific research. It can be said that whichever country has mastered the most advanced electronic technology will become the most developed and powerful country. ”

In China, whether it is an official or a scholar, it is the first time that Li Minghua has heard that someone has such a deep understanding of what he has learned, and from the mouth of a soldier like Song Zhewu, it is even more unusual, not only can he listen to it.

Seeing Li Minghua listening intently, he thought that he had to add some ingredients, otherwise it would not be easy to attract him. He went on to say: "At present, electromagnetism is only doing some rudimentary research in the field of communications. Since the Italian Marconi invented the space-ground cable device in 1895, the transmitter and receiver were improved, effectively increasing the radio propagation distance to 2.8 kilometers. The research of wireless telegraphy has developed rapidly, and the transmission distance can now reach several thousand kilometers. However, it is a little difficult to increase the transmission distance. This is because in the beginning, radio communication used long waves, which on the one hand was limited to the frequency of the transmitting equipment was not too high, and on the other hand, it was only known that the longer the wavelength of the wave in the propagation of electromagnetic waves, the less attenuation. In fact, long waves that propagate along the Earth's surface are limited by antennas and can no longer increase their propagation distance. With the development of electronic technology, the low-frequency section has become overcrowded, and the needs of broadcasting and military require the development of the short-wave section. Now it has been experimentally confirmed that short waves with a wavelength of tens of meters can be reflected back by the ionosphere at high altitude, and after multiple reflections, the propagation distance can be increased, which is commonly known as sky waves. As far as I know, the United States began to study military short-wave communication technology as early as World War I, and in 1918 it successfully developed a transmitting and receiving equipment with a wavelength of 70 meters ~ 150 meters. In 1921, Hull in the United States made a magnetron of high-power microwave devices, which could produce ultra-short waves with wavelengths of several meters. But these are not enough, I think the wavelength of this short-wave communication is 50-10 meters, the effect will be better. If this standard is met, our communications with the United States and Europe across the ocean will no longer have to be relayed step by step as it is now. In addition, there is still the problem of excessive size of the tube, especially the effect of the tube in processing high-frequency signals is not ideal, and semiconductor materials can solve this problem well. The ore tentacle geophone is actually the special name for the use of semiconductors. I have studied the ore radios that are now in common use, and I have found that germanium crystals mixed with some very small amount of impurities are not only superior to ore crystals, but in some respects better than tube rectifiers......"

Song Zhewu pointed to the incandescent lamp on the roof and said: "There is also the current electric lamp, which only relies on electric energy to make the tungsten filament in it heat and shine, the incandescent lamp has many shortcomings, the most obvious is that 90% of his electric energy is dissipated in the form of heat energy, but we can't make such a simple thing in China." I have done experiments, in a closed glass tube with a filament at each end, the glass tube is filled with a trace amount of argon and thin mercury vapor, the inner wall of the lamp is coated with phosphor, and the gas between the two filaments emits ultraviolet light when conducted, so that the phosphor emits soft visible light. Such lighting fixtures are far better than the current incandescent lamps. ”

Song Zhewu, who was talking eloquently, suddenly stopped talking, thinking that he saw his grandfather, Li Wentian, and Sun Sigui looking at him with a very envious and respectful gaze, Sun Sihua, Sun Sirong, and Wang Xuezhi all looked extremely surprised, and the most exaggerated was Li Minghua, who looked at Song Zhewu speechlessly in a daze.

Song Zhewu realized that he was a little too much, although he was a master of chemical engineering in his previous life, but these are very basic common sense, although he does not know the specific production and manufacturing methods. With the knowledge he has now, he can go to any prestigious university in Europe and the United States as a professor. What he said, not to mention his grandfather and Li Wentian, is too advanced and unbelievable for these students who studied abroad, and even Li Minghua, a contemporary doctor of electromagnetism. You must know that transistors only appeared in the late 50s, and fluorescent lamps in the real sense only appeared in 45 years.

After a pause for a long time, the grandfather who came back to his senses said with emotion: "Commander-in-Chief Song is really young and promising!" I didn't expect such a great soldier as the commander-in-chief to have such knowledge, but he really opened his eyes! The commander-in-chief is so knowledgeable, no wonder he appreciates my two dogs, and I am relieved that they are handed over to you. Commander-in-chief, let the old decay toast you. Song Zhewu hurriedly drank another glass of wine, and at the same time took the opportunity to hide his somewhat unnatural expression.

Li Minghua also came back to his senses at this time, looked at Song Zhewu and asked in a skeptical tone: "Commander-in-Chief Song, Sihua said that you graduated from the Dresden Infantry School in Germany?" ”

Song Zhewu replied with a smile: "It's true, I graduated from the Dresden Infantry School. ”

Li Minghua said suspiciously: "Is it difficult that the Leesden Infantry School also teaches electromagnetism?" ”

Song Zhewu said with a smile: "The Dresden Infantry School is a military school, and of course it will not teach electromagnetism. Mr. Li must have wondered where I, a soldier who graduated from a military academy, learned this knowledge? ”

Li Minghua shook his head like a wave drum and said: "It's not just strange where the commander-in-chief learned these electromagnetic knowledge, I'm strange, the commander-in-chief should have returned to China earlier, my research at the University of Lyon should be the most cutting-edge problem of electromagnetism, and the problems of transistors, short-wave and fluorescent lamps you mentioned are all things I have never heard of, or even heard of." What you say should be very sophisticated, such as short-wave communication, which is what you call fluorescent lamps, which are very novel and unique, and I think this patent of yours will definitely make you rich, why don't you apply for a patent? None of this can be done without a high level of knowledge of electromagnetism. ”

Song Zhewu had already thought of his rhetoric, and said with a smile: "These are some of my experiences and achievements from self-study and self-research. I just like novelties, and in my spare time in Germany, I like to learn some new knowledge, and I have been involved in many aspects of knowledge, not only electromagnetism, but also Mr. Wang's smelting profession, and Sihua's military industry. I had several large boxes of research notes and materials, but unfortunately I lost them all when I returned to China. For example, I have a lot of research on open-hearth steelmaking, such as how to improve the oxidation surname of open-hearth; How to reduce the coke ratio of a blast furnace. ”

And he joked, "You don't think I'm not doing my job, are you?" ”

"The smelting commander also understands?" Wang Xuezhi asked in surprise.

Song Zhewu nodded and said, "I don't dare to say that I understand, I just have some research on some aspects." ”

Regarding the loss of the information, Li Minghua and several other people who returned from studying abroad knew its value and sighed.

Father Sun also understood at this time, although he didn't know how profound what Song Zhewu had just said, it could be seen from the expressions of his two sons, Li Minghua and Wang Xuezhi, that they all admired Song Zhewu. Where can they be the soldiers who can be admired by foreign students who have returned from abroad! The grandfather was very happy that his son could be under Song Zhewu, and said with a smile: "The commander-in-chief has made outstanding achievements in the past few years, and we have all heard of it for a long time. And the commander-in-chief is erudite and talented, and he has the style of Confucian generals from ancient times, which is rare! Commander-in-chief, I'll give you another glass. ”

For his grandfather's toast this time, Li Minghua, Wang Xuezhi and the Sun brothers also drank it all, and they really admired Song Zhewu now.

Grandfather was busy serving vegetables to Song Zhewu and Li Wentian again, but Li Wentian just listened quietly and couldn't stop thinking about this.

Seeing that the interest of Li Minghua and Wang Xuezhi had been thoroughly aroused, and he was just about to continue to hang their interest again, Wang Xuezhi couldn't help but ask: "Reducing the focal ratio can reduce a large part of the cost, how is this done?" ”

Song Zhewu smiled and said, "I can't tell you this question. ”

Song Zhewu's words made several people present stunned, and Wang Xuezhi quickly said embarrassedly: "It's abrupt, don't be surprised by the commander-in-chief, Xuezhi is just curious, such a technology can be patented." ”

Song Zhewu shook his head and said, "Not telling you now is not the reason for applying for a patent......

(To be continued)